gst/gstghostpad.h

/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wim.taymans@chello.be>
 *                    2005 Andy Wingo <wingo@pobox.com>
 *
 * gstghostpad.h: Proxy pads
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */


#ifndef __GST_GHOST_PAD_H__
#define __GST_GHOST_PAD_H__


#include <gst/gstpad.h>


G_BEGIN_DECLS

#define GST_TYPE_PROXY_PAD              (gst_proxy_pad_get_type ())
#define GST_IS_PROXY_PAD(obj)           (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PROXY_PAD))
#define GST_IS_PROXY_PAD_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PROXY_PAD))
#define GST_PROXY_PAD(obj)              (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PROXY_PAD, GstProxyPad))
#define GST_PROXY_PAD_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PROXY_PAD, GstProxyPadClass))

typedef struct _GstProxyPad GstProxyPad;
typedef struct _GstProxyPadPrivate GstProxyPadPrivate;
typedef struct _GstProxyPadClass GstProxyPadClass;

struct _GstProxyPad
{
  GstPad pad;

  /*< private >*/
  GstProxyPadPrivate *priv;
};

struct _GstProxyPadClass
{
  GstPadClass parent_class;

  /*< private >*/
  gpointer _gst_reserved[1];
};

GType gst_proxy_pad_get_type (void);

GstProxyPad*     gst_proxy_pad_get_internal     (GstProxyPad *pad);


GstIterator*        gst_proxy_pad_iterate_internal_links_default (GstPad *pad, GstObject *parent) G_GNUC_MALLOC;
GstFlowReturn       gst_proxy_pad_chain_default                  (GstPad *pad, GstObject *parent,
                                                                  GstBuffer *buffer);
GstFlowReturn       gst_proxy_pad_chain_list_default             (GstPad *pad, GstObject *parent,
                                                                  GstBufferList *list);
GstFlowReturn       gst_proxy_pad_getrange_default               (GstPad *pad, GstObject *parent,
                                                                  guint64 offset, guint size,
                                                                  GstBuffer **buffer);

#define GST_TYPE_GHOST_PAD              (gst_ghost_pad_get_type ())
#define GST_IS_GHOST_PAD(obj)           (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
#define GST_IS_GHOST_PAD_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
#define GST_GHOST_PAD(obj)              (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GHOST_PAD, GstGhostPad))
#define GST_GHOST_PAD_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD, GstGhostPadClass))
#define GST_GHOST_PAD_CAST(obj)         ((GstGhostPad*)(obj))

/**
 * GstGhostPad:
 *
 * Opaque #GstGhostPad structure.
 */
typedef struct _GstGhostPad GstGhostPad;
typedef struct _GstGhostPadPrivate GstGhostPadPrivate;
typedef struct _GstGhostPadClass GstGhostPadClass;

struct _GstGhostPad
{
  GstProxyPad pad;

  /*< private >*/
  GstGhostPadPrivate *priv;
};

struct _GstGhostPadClass
{
  GstProxyPadClass parent_class;

  /*< private >*/
  gpointer _gst_reserved[GST_PADDING];
};


GType            gst_ghost_pad_get_type          (void);

GstPad*          gst_ghost_pad_new               (const gchar *name, GstPad *target) G_GNUC_MALLOC;
GstPad*          gst_ghost_pad_new_no_target     (const gchar *name, GstPadDirection dir) G_GNUC_MALLOC;

GstPad*          gst_ghost_pad_new_from_template (const gchar *name, GstPad * target, GstPadTemplate * templ) G_GNUC_MALLOC;
GstPad*          gst_ghost_pad_new_no_target_from_template (const gchar *name, GstPadTemplate * templ) G_GNUC_MALLOC;

GstPad*          gst_ghost_pad_get_target        (GstGhostPad *gpad);
gboolean         gst_ghost_pad_set_target        (GstGhostPad *gpad, GstPad *newtarget);

gboolean         gst_ghost_pad_construct         (GstGhostPad *gpad);

gboolean         gst_ghost_pad_activate_mode_default  (GstPad * pad, GstObject * parent,
                                                       GstPadMode mode, gboolean active);

gboolean         gst_ghost_pad_internal_activate_mode_default   (GstPad * pad, GstObject * parent,
                                                                 GstPadMode mode, gboolean active);

#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstGhostPad, gst_object_unref)
#endif

#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstProxyPad, gst_object_unref)
#endif

G_END_DECLS

#endif /* __GST_GHOST_PAD_H__ */